stresser: (g=0): rw=write, bs=16K-16K/16K-16K, ioengine=mmap, iodepth=1
fio: mixed read/write workload with verify. May not work as expected, unless you pre-populated the file
stresser: (g=1): rw=randrw, bs=16K-16K/16K-16K, ioengine=mmap, iodepth=4
Starting 2 processes
stresser: Laying out IO file(s) (1 file(s) / 4096MiB)

stresser: (groupid=0, jobs=1): err= 0: pid=17394
  read : io=4,096MiB, bw=236MiB/s, iops=15,100, runt= 17360msec
    clat (usec): min=11, max=143, avg=13.87, stdev= 2.47
    bw (KiB/s) : min=    0, max=247936, per=97.22%, avg=234895.54, stdev=41467.59
  write: io=4,096MiB, bw=19,311KiB/s, iops=1,206, runt=217187msec
    clat (usec): min=14, max=762K, avg=634.29, stdev=11061.71
    bw (KiB/s) : min=    0, max=79264, per=108.37%, avg=20926.95, stdev=23087.99
  cpu          : usr=29.83%, sys=3.52%, ctx=25781, majf=1, minf=2102310
  IO depths    : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     submit    : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     complete  : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     issued r/w: total=262144/262144, short=0/0
     lat (usec): 20=51.67%, 50=44.80%, 100=0.26%, 250=1.28%, 500=0.37%
     lat (usec): 750=0.26%, 1000=0.34%
     lat (msec): 2=0.47%, 4=0.07%, 10=0.13%, 20=0.11%, 50=0.07%
     lat (msec): 100=0.07%, 250=0.06%, 500=0.02%, 750=0.01%, 1000=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=17656
  read : io=4,037MiB, bw=155MiB/s, iops=9,935, runt= 26005msec
    clat (usec): min=2, max=105, avg=15.14, stdev= 3.63
    bw (KiB/s) : min=    0, max=244576, per=98.78%, avg=157031.35, stdev=45379.01
  write: io=1,024MiB, bw=47,880KiB/s, iops=2,992, runt= 21900msec
    clat (usec): min=3, max=700K, avg=30.55, stdev=2732.73
    bw (KiB/s) : min=    0, max=52672, per=98.50%, avg=47162.20, stdev=10407.86
  cpu          : usr=6.98%, sys=1.02%, ctx=18806, majf=0, minf=1114013
  IO depths    : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     submit    : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     complete  : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     issued r/w: total=258382/65536, short=0/0
     lat (usec): 4=0.01%, 10=5.15%, 20=78.41%, 50=16.42%, 100=0.01%
     lat (usec): 250=0.01%
     lat (msec): 750=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=236MiB/s, minb=236MiB/s, maxb=236MiB/s, mint=17360msec, maxt=17360msec
  WRITE: io=4,096MiB, aggrb=19,311KiB/s, minb=19,311KiB/s, maxb=19,311KiB/s, mint=217187msec, maxt=217187msec

Run status group 1 (all jobs):
   READ: io=4,037MiB, aggrb=155MiB/s, minb=155MiB/s, maxb=155MiB/s, mint=26005msec, maxt=26005msec
  WRITE: io=1,024MiB, aggrb=47,881KiB/s, minb=47,881KiB/s, maxb=47,881KiB/s, mint=21900msec, maxt=21900msec

Disk stats (read/write):
  sda: ios=16741/63706, merge=700/1232585, ticks=265507/108617084, in_queue=108882501, util=92.86%
95.02user 53.12system 12:08.31elapsed 20%CPU (0avgtext+0avgdata 16861280maxresident)k
8390640inputs+18760232outputs (8major+3220193minor)pagefaults 0swaps